Mood and Anxiety Disorders: Generalized Anxiety and Panic Disorders.

Anxiety disorders are characterized by excessive fear and worry. Generalized anxiety disorder (GAD) and panic disorder (PD) are two of the most common anxiety disorders in the United States. GAD is defined as excessive worry and anxiety that occur on most days for at least 6 months that affect daily functioning.

Mood and Anxiety Disorders: Bipolar Disorder.

Bipolar I disorder affects approximately 0.4% to 1% of the global population. In the United States, bipolar-related disorders are associated with a significant economic burden because of the functional impairment they cause.